diff --git a/.changeset/tall-socks-listen.md b/.changeset/tall-socks-listen.md
new file mode 100644
index 000000000000..af99a409f0f0
--- /dev/null
+++ b/.changeset/tall-socks-listen.md
@@ -0,0 +1,8 @@
+---
+'@modern-js/runtime': patch
+'@modern-js/runtime-utils': patch
+---
+
+fix: mergeConfig function to return an object when the first configuration is not an object
+
+fix: 修复 mergeConfig 函数，使其在第一个配置非对象时返回对象
diff --git a/packages/runtime/plugin-runtime/src/core/plugin/index.ts b/packages/runtime/plugin-runtime/src/core/plugin/index.ts
index 57e43f2cfc07..590ed85129f3 100644
--- a/packages/runtime/plugin-runtime/src/core/plugin/index.ts
+++ b/packages/runtime/plugin-runtime/src/core/plugin/index.ts
@@ -32,5 +32,5 @@ export function mergeConfig(
   config: Record<string, any>,
   ...otherConfig: Record<string, any>[]
 ) {
-  return merge(config, ...otherConfig);
+  return merge({}, config, ...otherConfig);
 }
diff --git a/packages/toolkit/runtime-utils/tests/merge.test.ts b/packages/toolkit/runtime-utils/tests/merge.test.ts
index d03495ba7d9e..6cf754752304 100644
--- a/packages/toolkit/runtime-utils/tests/merge.test.ts
+++ b/packages/toolkit/runtime-utils/tests/merge.test.ts
@@ -51,4 +51,10 @@ describe('merge function', () => {
     const result = merge({}, obj1, obj2, obj3);
     expect(result).toEqual({ a: 3 });
   });
+  test('should return right value when item is not object', () => {
+    expect(merge({}, true as any, { a: 1 })).toEqual({ a: 1 });
+    expect(merge({}, false as any, { a: 1 })).toEqual({ a: 1 });
+    expect(merge({}, 1 as any, { a: 1 })).toEqual({ a: 1 });
+    expect(merge({}, 'b' as any, { a: 1 })).toEqual({ a: 1 });
+  });
 });